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NG6 sandwich (4× M5 bolts), between directional valve & subplate
Seal Material
NBR (standard, code V — for mineral oil HL/HLP, HFC)
Hydraulic Fluid
Mineral oil HL, HLP per DIN 51524; HFC (water-glycol); HLPD, HVLP, HVLPD
Fluid Temperature Range
-30 °C to +80 °C (NBR seals)
Viscosity Range
10-800 mm²/s
Weight (approx.)
1.24 kg
Body Material
Steel / cast iron, zinc-plated
Related Products
Part Number
Model
R900455718
2FRM6B36-2X/3QRV
R900455776
2FRM5-3X/1.2QV
R900455777
2FRM10-3X/5LV
R900455816
2FRM6B36-2X/25QRV
R900457438
2FRM5-33/15QB
R900459258
2FRM5-33/0.2QJ
R900460687
2FRM5-33/10QV
R900461688
2FRM5-33/15QBV
R900462100
2FRM5-33/1.2QBV
R900462101
2FRM5-33/0.6QBV
Frequently Asked Questions
Q1: Is this a simple throttle / needle valve?
No. A simple needle valve lets flow vary with pressure difference. The 2FRM is pressure-compensated — the built-in compensator spool keeps the set flow essentially constant despite load or supply pressure changes (provided ≥~15 bar ΔP across compensator).
Q2: What does "B36 /10QRV" mean?
B36 = NG6 sandwich, rotary knurled knob with scale (0-max reference) + locking setscrew — adjustable by hand
/10 = maximum adjustable flow = 10 L/min (medium-capacity version; also available: /1.5, /3, /6, /16, /25, /32)
Q = flow controlled in A→B direction
R = free reverse flow B→A via check valve
V = NBR seals (standard)
Q3: How do I set the flow?
Loosen the lock setscrew, turn the knurled knob clockwise to increase flow, counterclockwise to decrease. The knob has a relative scale — use a flow meter to correlate to actual L/min. Retighten the lock setscrew after setting.
Q4: How is it mounted?
As a sandwich (stackable) valve between a directional control valve and the NG6 subplate, same bolt pattern as ZDR/Z2FS sandwiches (4× M5). Observe the arrow on the valve body — A→B = controlled/metered flow, B→A = free return.
Q5: Does it work both ways?
No — one direction is pressure-compensated metered flow (A→B), the opposite direction (B→A) is free return through the check valve (no flow control, minimal pressure drop ~0.5 bar). For bidirectional flow control use two 2FRM valves.
Q6: Minimum pressure requirement?
The pressure compensator typically needs min. ~15 bar differential pressure across the compensator to regulate properly. Supply pressure must exceed the highest load pressure + ~15-20 bar + line losses.
Q7: Common faults & causes?
Flow varies with load pressure: compensator spool stuck (contamination) — check oil filtration (ISO 4406 18/16/13 or better); or insufficient ΔP across compensator
No flow / very low at max knob: valve installed backwards, or compensator/spool jammed
Cannot reach set flow / unstable: partially clogged orifice, cold-start high viscosity — flush system
Excessive heat: normal for flow controls — P_drop × Q = heat; ensure supply pressure isn't unnecessarily high above load requirement
Q8: Fluid & seal compatibility?
NBR seals = mineral oil (HL/HLP) & HFC (water-glycol). For HEES/HETG biodegradable oils or HFD phosphate ester → specify FKM (Viton) seal variant.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
